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DIGITAL.CSIC
Article . 2008 . Peer-reviewed
Data sources: DIGITAL.CSIC
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Docta Complutense
Article . 1982
Data sources: Docta Complutense
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Correlación y evolución paleogeográfica del Cretácico al norte y sur del Sistema Central

Authors: Alonso Zarza, Ana María; Mas Mayoral, José Ramón;

Correlación y evolución paleogeográfica del Cretácico al norte y sur del Sistema Central

Abstract

[ES] La comparación de las facies y paleogeografía del Cretácico de los bordes N y S del Sistema Central español pone de manifiesto algunos hechos de gran interés para la comprensión de la evolución del sector meridional de la cuenca del N de España (Meseta norcastellana) y su articulación con la cuenca Ibérica durante el megaciclo del Cretácico superior. En este trabajo se estudian las series tipo conocidas en ambos bordes, correlacionándolas sobre todo a partir de datos sedimentológicos y evolutivos. Asimismo, se hace un estudio de la paleogeografía del área y de los factores paleotectónicos más importantes que afectaron a la sedimentación llegando a las siguientes conclusiones: — En primer lugar, se reconocen en la parte meridional los dos ciclos sedimentarios (Cenomano-Turoniense y Senoniense), ambos de carácter transgresivo-regresivo que ya eran conocidos en el Norte. — Además se reflejan los accidentes paleogeográficos de dirección NW-SE (Escalones) ya conocidos en la región de Segovia, manifestándose su importancia como condicionantes de la sedimentación. — La dirección NNE-SSW que delimitaba la forma de la cuenca es aquí también reconocida. El mar penetró más profundamente a lo largo del borde meridional de la Sierra durante el Turoniense, probablemente a lo largo de un surco marginal. — Por último, es posible ver que durante el segundo Ciclo se produce la homogenización de la cuenca, no reflejándose ya en la sedimentación la influencia de la dirección estructural NNE-SSW, que tenía gran importancia en la distribución de las facies durante el desarrollo del Ciclo Cenomano-Turoniense.

[EN] This paper compares the facies and paleogeographic events of the cretacic outcrops, situated in the Northen and Southern parts of the Spanish Central Mountain Chain in order to obtain a better comprehension of the historical evolution in the southern margin of the Cretaceous North Basin (Meseta Norcastellana) Besides it will provide some ideas about the relations between this basin and the Iberic one. It correlates the best developed sections of the Upper Cretaceous in the North and the South, and some sedimentological, paleotectonical and paleogeographical conclusions are obtained: They also exist two sedimentary cycles (Cenomanian-Turonian Cycle and Senonian Cycle) with transgresive regressive character, like in the rest of the basin. It is possible to recognize the thresholds of NW-SE direction which condition the characteristics of sedimentation and the paleogeopraphic direction -NNE-SSW which determines the shape of the basin. During the second cycle (Senonian) the homogeneization of the conditions in the basin is produced and it is not reflected anymore the paleogeographic thresholds with the direction NNE-SSW which was very important during the first cycle.

Peer reviewed

Country
Spain
Keywords

2506.19 Estratigrafía, Correlaciones estratigráficas, 56:574.9(234.1), 551.763(234.1), Geología estratigráfica, España, Cretácico, Sistema Central, Sistema Ibérico, Paleogeografía

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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